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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f840ff680a1af96c1ab3a270e93cf573886c4a38a61790a9e63e2644a25d1329' 
  AND token = '2OOeyNJA9ggrcYdtENvlE9Sav7vJmgFb/wa7F27B1rY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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