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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '489fa60e98ff698ae5e02556e35980e0a8d4484ddeef895158e57a30795b45c6' 
  AND token = 'VRA0r6o10JIsdqFc7TBE9QPr/ci9zRxa8b2gE5HWrkE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

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