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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1d8f44d167580d1d7008347ee1978647cce20feabfdf8b43f8d41417a30d3f88' 
  AND token = 'nKHqG1F9rPrE05KfgR3qULelfyXOEXdlEv7L5pZ5VF0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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