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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '116b8d615da5b15317193c286d0641bc956e7b366266bc115e09667b9b2b2cc5' 
  AND token = 'aBwGI+JLO2/tLUqvXEqGij5J9pwe6mq2RODBIHbLJzY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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