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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '72f6b10fc20575df9d0ec97b35c75ed936a87be6dad19cd6786a5f7267fe839b' 
  AND token = 'qRqtDYwkMwaRh2aQdxHzy0miNiaKCxtsAGm73SS1DJU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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