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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e932b7f420cf887b63584763d96fd637e602f432bf828aa22ca7a654a9d03ff' 
  AND token = 'p+aA94VOHREkjpfol4nl1Pvi37096nZRU1nRGxZO1OY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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