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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd05930f906a8af1e18e3ee193ce1db65261a0c45addd30d62cdd37617f9fa835' 
  AND token = 'bjZXtOV6A1BvlNEkQelOr71+4SQw6PKgHxG9yj3a8xw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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