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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '044d323e42495f5d1d69a90fa29e226dd15a2eb6c5d591920c8aaed146c45cde' 
  AND token = '0vwn1eNE70Zl/39we4ndicCuAxt/mPLEnnyjmuzPTRs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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