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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3b79042cf5f2983db5f5902f2b9f4d7b0c45d9dbda2b342c18be332d82f45761' 
  AND token = 'tGtIIccs7zR9+SwoKBRpksIQSIuqBtRyRaYkoMCUV5M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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