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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '012f17a7b2c666bf8caf6eedd31074bb412d0d94e7f689dd19861bda15a3cb36' 
  AND token = 'ZkV6G2/gMlpHJL8f+rSCDIne20s37DbQykryctrIFzI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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