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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5680bcf415b4841abf947f14c002057bd6e6600dde9d3b3a18fc86a004fb7c0d' 
  AND token = 'wWapTaRh+dZPueFVbsXK64qknK6+RNViVkk3GjGb0zE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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