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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '62644d89e10294bdbacd636f6488477233a400854d73ed9b4a42c3646f459dc0' 
  AND token = 'jKnqR7UHJzpe2vqUx/SG6A98r6R9fEwmI4Ixvovy+ac=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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