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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '485038a41da19e18711e1e25a86cb4db1727ffeceb5ac04e7cb0e92975a29a3e' 
  AND token = 'BmH+0cU8fXsdC85K3GdnBuNnbriO6VngiMvaf7XjIVs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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