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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dfe26d3c038020f1e3cb82db6895322f687b77e3cb93c328a68916517704cee1' 
  AND token = '7lpG/P0ATz2WHcvjZL0i/dYxsRRsXp6tHn78IIdIT7s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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