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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '132c93615da97747842aad84fef8dbacd2aa0ad929ce0dd36cfa32d99a6ae225' 
  AND token = 'vLIFKME9z6EicyWcYhsNCP9Uese41HZCTv9ZV3Ia05s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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