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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a13ea588ff6d4c44c39fbd4f70f2ee0871f13f711f8bb1058d51e70132b229b' 
  AND token = 'VFSBjynbyw1mfuKkSa8IL3pm+4XuGy3F8Ku718ebM5s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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