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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b0e74c457fc3e997f4a9bcd49a2ac643d03c659d316f2ab99a85d8aab2d93749' 
  AND token = '329oehM7Zc2gQvIcSSzXCrEtAOFji8zGx+PtXS3sxRQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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