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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '19ed2d22822e2ee6b607d8e7a1519e5d58e24bf4ce24d42b2185de28db63895e' 
  AND token = 'Zq5CrJAFUmwD7J9R4DWoiBoNf0/hpQsPjX6I+hAm+Q0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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