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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed37cdae6cff77b27a61055cf6a1bb6f23c788bec40466f0c78ea91a40cacd18' 
  AND token = 'drkK0Qnc3ixMhBHTvaqf9l24RbqEo2kq91lGLkC3yAY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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