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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a36d88870ed630e2701ca93cf2cc7d7e90c6d7f1806f44ab35b6eab3dda10cb8' 
  AND token = 'PLByeOzFF67UCSL8FXy4VUYVEmmdWys/+ap9KAwB3kM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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