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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b32c5e7f86bfb450b05ca88f9a830f06865bb36dbedd452530590c4dde09977' 
  AND token = '5RPityke8qYD+i8DAIc2dORCIzYV0x0Lnx1DWVMuBEU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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