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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '860bccc34c1c1614d8fa82ddae6ea235a0801c5640d8661da14f7ac916a1cc99' 
  AND token = '+EFp/u5MWC2CVX28h1eHxTv6d/VoX+z8eGnSYBSV7/E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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