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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '029baa324b944a9a36f67458e3788e498b3aae1bbab4db4c04a6a74d4a3076c1' 
  AND token = 'Ssh2U3KkJy8uLoBeEo+JX99q03R2vfqnVr5yx/fRu2E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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