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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b35a5ed0abcb51a3c51074b5fd4906da54c1332b177ecead648728b5ffbdd049' 
  AND token = '5ssJTCHam8p4u6EAWiFp3VDww/aPpwSNBYjKjKUDtu4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00105

JSON explain

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