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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07652642f8c0f863030b1aba8a9179dcd8736c2c1cf20b5a4a4de2d0b1b4615d' 
  AND token = 'TW41E0kfdXlNPlvuLeQ9txvqK6gthaCV9HK87Rsaxjg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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