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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1aaa8d87d0bb1b14c22075e44d08355d53d2b3b009588f4e8b568a0b6c94c4ab' 
  AND token = '0Dx4/d4S7uUzP0wZ3qAcUcn91XzzY44aTKT2M0X6J+w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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