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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cbf4f14267d647bda7a8a99900c7ede5d8e2cc1b4687e380d09f5fbc6574372e' 
  AND token = 'GWkAQDpccsEBsWfasw/XSt/APvRPvSIGLqnPvsf/nQQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}