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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1fea2ed14c5ced68687d9933367625c09ec7e5416d729b422f2e7b0df4450f9' 
  AND token = 'e1YbSpqeERkDqQ+S/ozTGJ37pmf/1zpq7pbY3F2cFd8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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