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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5bfc5a8a63f161d368caa4d45b30fd39091334252d10d5a0a54032d652ca044e' 
  AND token = 'T6DrYhA3nzTUtSr/unKXyIgCWdhQNvhFv+MsmPWtLdw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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