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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0d1854636a0676ca5b7c876f08d667bd1f3a2da0a4b625e2e7d3c608efd429fd' 
  AND token = 'YxW10zmraeVQtnpnarcbw7JKbeAib1Pg/ofjYuHIEFg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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