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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd3c7eea1acf2fc7c189cf6dc8aac62bb04cbb34936c280001d4d2e1958d25973' 
  AND token = 'NjQCR/tJKpxRa5aRoWesPw4LAjdeUwOY0mgXIXmCEMA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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