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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1fa7a126899746bfe1c573b87f13cbc9682caf19906235354b0132ab008e1413' 
  AND token = 'dy8/pkodw/J3VrNm47WBsTwswEzp3HDkcaO6St2c6ig=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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