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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1a66c94185a5c2522aa823448b9e96cbad38115effc4c7ad24fe4d53f9fa1908' 
  AND token = 'vyZdi1O85pRfz5VdR8zjghZwbZSPBU4Lm4I7A8XDww8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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