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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c49cfdf475fc8de1e455f64c8c50939dffe3a16d7c90ed7b67eb17f0b128fce4' 
  AND token = 'NVI8riXs/Q/RwNbUaA/N0aISYDA4O5c7B2WQWkRinjM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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