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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6a7bc4c7f3b3c8f81b5809f9587ce9b947711d9e95910bedb7d77819e6c0899e' 
  AND token = 'WZFK3iyCWHtfD7BX/OsREqoI7tin7Dnmi0Og8w83rVg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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