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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a0f1eaa6fcc857f1282ebc9baf8d8ec3900b8b0b7288c686e0eef91cec0980a' 
  AND token = 'TS2uCsuFQJb7gaf/1zIlLOG7KZ44j+01xeUQ9a1RLec=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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