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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64307e4390c140949f5b8d70dede6e7ce6d52ef89697f8f7c97ebc25d673ec94' 
  AND token = 'ZehNGF0+H9MBvfY2cRqgkbO8Yw14Zwei3TXOHFr+FRA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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