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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '99512ff4e2b92a1b777e1cb1c9fb0d19ebfaa582ebe483bbcba5b62aee17b78c' 
  AND token = 'N2eo5+DLtTJ8zWDWPcH/NvAb0q5f9HNIaMhnVkmm0fk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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