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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2418c3e2f2637a91ec1b9610d9eb69be7d863281611a16f6318ec2af3b5e9b42' 
  AND token = 'faQd6qi6/9/UZO+M9+2OoXz+m/cgffVCadOwAtpAMHk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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