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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c13ebcf8314ccf4f25e6e55a22f6696021b054a6e272aa37249703154a36613b' 
  AND token = 'mx4dfI4mFe3uNWPKsUW9j/VVpLzjvto1XUGsYfZmlI4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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