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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '15094f6131c538e3494cbcc58a53cfd5d54d8b9f3a1726df4ca33ed94ba37191' 
  AND token = 'DIp6I4RGCkP1aJu49V4SRygHQIoG1/iRfYxu75cJlrk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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