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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1353c2d7ed408dd0ae2b8fb52f2b3dca82872e965931c6d16d66a16052658660' 
  AND token = 'd0xL7Eno++kiCZUp0t7PRUFpOj3wWMHoDkX0vg68pNQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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