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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3bc3c1f3a63c1bbbc07fb39e141185af8453c77d938bddedaa911a1ddcb5a7a7' 
  AND token = 'hhePvVN9zscTf8JIAMU3tamRi3x4flUS+KiRBV2Y+kU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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