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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70bb48c9dabb2ba060cf8e93746c84f8da0ff66a4a1af1a4cbb704c8b6141de0' 
  AND token = '01dKYotH94XX/TtM0Enbgfr0RY+cVk1etX0bPA3ryYQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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