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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ba2b415f29f5532412cd10f44b1de2125d6f4d9e97b527b93c4f3122ddeefce8' 
  AND token = '+EOw4nWMwCX5CW8+cvRovWFxFZsRlBoh3E2u9k7exkw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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