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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e28fb3007479b412c76e00b7365343277ea4b2da7b4cf987596f7c03b98c8e4' 
  AND token = 'hqGB9l1GCLrqL78Td1Tk7HgkECcfA/ixhNaLVeoAtNA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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