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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa718f25c5ad03a1a25b435e8293ac631c9e322499bbe17f9973d2d70b2c5219' 
  AND token = 'gICEZATuPd86lzpnZFaKUqfPT2oVf/CNicsjAt4sNuE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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