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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34812c6334c63340a3deb85f11046559b0ea3dd6bef39fbe6d62a785c819d78e' 
  AND token = 'kf4p2dsseoBWarbFIW12281vxGY2WRZurxjId9gIYa0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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