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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '092076cd372a8d84fb9b68974f3d041a5aac10208b4c428ec5f4b9844f334074' 
  AND token = 'CNGtJ9hGN7gRqeARncC/EoxdcspI2Uc9kek2LBLURLY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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