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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '92223457415ed4d1345545d28f1c1efeae0fa094873c773b0580b3dbe36758b0' 
  AND token = '+Qb67LGL6ZVV30/NlAk1xja8d6CgJWOM6Vd7+k3dD+k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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