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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5f9e77ca5de343b716cc26c2a34fe0932fdde79497a701df4f42ea87a3ada0d2' 
  AND token = '+YS2e2oKYrDgY+PdAv0BIwuZAR1vcBO/r/0k8yyTHeo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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