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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72e402e61dcf9db10008b0271e9c0b23566f9aa742ee7756f27c1bceb3f1f313' 
  AND token = 'RXrJag7M399bazV5BDiPbpaTfXr2lyTLPJMHg+3Ef6g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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