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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '0e081884c864c1d7a0e551bdca4b7fdeaf40beb0a8b4e38c47ecedb9bcf10ca6' 
  AND token = 'NTN0Y5gG4f8BzHQ+XibnRPvZQwcCdag8mChFU00BNzY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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