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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb16837db6a7d494a7bd8e4b8ed0af3ffaeb066fcfadb2d764c3fcd65be9a08a' 
  AND token = '248R0zwJR6t77XO95CjHJ+XLZpcLANx8prKMu6/YQl8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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