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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '54524f767c9ac8ae045d5fc86fbc3c9a8e4f40695132803cb729be7ff61d950f' 
  AND token = '3PH+HLVhc41v81hfCO/wUAqzeWQoPN/W1VA5IzTDeaU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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